Everything about "pox leber" as a minced oath, and an earlier source.

[Aga Tentakulus]

Potz Blitz and Potz Donner are still in use in Switzerland today. More than you might think.
But what if I split ‘leber’ into ‘leb er’.
Conversely, ‘er leb’ probably. He lives.
But here I am reaching the limits of the sentence structure.